Do you like your speakers aimed directly at each ear or....

My Vandy 2CE Sig I’s are almost straight ahead with very very little toe-in. Provides the best soundstage and imaging.

Really, all speakers are different. 

Think of your toe-in angle as a treble level control and an imaging control. Straight ahead to start, then dial in gradually to get the right tonality (clear and detailed but not too sharp) and image specificity (image wide and deep, objects distinct side to side, front to back not too diffuse and confused).

Depends on room and EARS. I have found the 1 or 2 inches can and does make a difference.

I like my speakers mounted on gimbals that swivel to keep them constantly aimed .... but I can't tell you where then you would copy it and I wouldn't have the best stereo in the world any more.

9 feet from couch, 9 feet apart, 
on carpet spikes, great sound.
slightly toed in to my sitting position!